Separating techniques

Question 1

Separating by particle size

Answer 1

Sieving
gravitational filtration
Vacuum filtration

Question 2

Sieving

Answer 2

You use a strainer and pour the sand and water into it and it catches the solid

Question 3

Gravitational filtration

Answer 3

Rely on weight of solid particle to filter the two materials (wait for sand to settle to bottom)

Question 4

What is filtration

Answer 4

Used to separate an insoluble substance from a soluble substance

Uses porous barrier to separate the solid from liquid

Question 5

What mixtures are used with filtration

Answer 5

Used to separate heterogeneous mixtures composed of solids and liquids

Question 6

Separation by density

Answer 6

You can use
Sedimentation/decantation
Separation funnel
Centrifugation

Question 7

Sedimentation-Decantation

Answer 7

Sedimentation is where the more dense material sinks to the bottom of the substance and decantation is when you pour out the liquid at the surface

Question 8

Separation funnel

Answer 8

Can be used when liquids dont mix. Tap at the bottom and you can let most the dense material out

Question 9

Centrifugation

Answer 9

When we spin a mixture in a centrifuge, this helps to settle finer particles that may not settle naturally

Question 10

Separation by boiling point

Answer 10

Evaporation
Distillation
Fractional distillation

Question 11

Evaporation

Answer 11

Is where you boil off the solvent and it leaves the dissolved material (solute) behind

Question 12

Distillation

Answer 12

Uses evaporation but also collects the gas in a condenser and convers that back into liquid

Question 13

Fractional distillation

Answer 13

Used for mixtures that have many different substances in them, that all have slightly different boiling points (All heated and all will be in layers based on their boiling points)

Question 14

When is distillation and evaporation

Answer 14

Used to separate homogeneous mixtures

Question 15

Crystallisation

Answer 15

Technique that results in the formation of pure solid particles from a solution containing the dissolved substance.

As one substance evaporated the dissolved substance comes out of the solution as crystals

Question 16

Separation by electric charge

Answer 16

Electrostatic separation can be used to separatte charged solid particles from a gas.

Question 17

Chromatography

Answer 17

(Electric charge separation) technique that relies on how sticky one material is to a static medium this separates the components of a mixture out

Question 18

magnetic separation

Answer 18

Used to separate a magnetic substance from a non magnetic substance